As eluded to before, the stamping "Sheffield England" suggests that it was made for sale in the US (which most Sheffield razors and knives were) in or after 1891, as mandated by the McKinley Tarrif of 1890. However, There are many, many one off productions. I have a Geo. Wostenholm commemorative razor that is, as far as I have found, one of a kind.